文献类型：期刊文献

英文题名：MoS2 quantum dots chemically modified with porphyrin for solid-state broadband optical limiters

作者：Jiang, Peng[1];Zhang, Bin[1];Liu, Zhiwei[1];Chen, Yu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Inst Appl Chem, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：43

起止页码：20449

外文期刊名：NANOSCALE

收录：;EI(收录号：20194607696798);WOS:【SCI-EXPANDED(收录号:WOS:000502779900006)】；

基金：This work was supported by the National Natural Science Foundation of China (61378072), the Natural Science Foundation of Shanghai (19ZR1413100), and the Fundamental Research Funds for the Central Universities (50321041918013). The authors thank Prof. Wang Jun and Dr Dong Ningning from Shanghai Institute of Optics and Fine Mechanics for their help with the Z-scan measurements. The authors also thank Kang Yan from the Research Center of Analysis and Test of East China University of Science and Technology for the structural characterization of the materials.

语种：英文

外文关键词：Nanostructured materials - Nonlinear optics - Optical properties - Semiconductor quantum dots - Esters - Molybdenum compounds - Nanocrystals - Layered semiconductors

摘要：MoS2 quantum dots (MQDs) with unique electronic and optical properties are promising broadband nonlinear optical (NLO) materials for ultrafast optical applications. It would be very interesting and challenging to functionalize MQDs with another hotspot optoelectronically active molecule "porphyrin". Herein, by treating MQDs with tetraphenylporphyrin (TPP) diazonium salts, we synthesized a novel nanohybrid material, MQD-TPP, in which TPP was covalently functionalized to the surface of MQDs via a C-S linkage. To explore its solid-state broadband NLO application, the MQD-TPP nanohybrid was encapsulated into a poly(methyl methacrylate) (PMMA) matrix for the open-aperture Z-scan measurements at 532 and 1064 nm. In contrast to MQDs/PMMA and TPP/PMMA, the MQD-TPP/PMMA film exhibited superior nonlinear optical and optical limiting responses with the largest nonlinear coefficients (beta(eff)) and the lowest optical limiting (OL) thresholds of about 1059.17 cm GW(-1) and 1.62 J cm(-2) at 532 nm and 831.13 cm GW(-1) and 1.97 J cm(-2) at 1064 nm, respectively.